G y r i n u fl 143S 



Defcr. Magnitudo G. natatoris, fed in medio mi- 

 nus dilatatus , & elytra verfus apicem parum atte- 

 nuata. Caput, antennse, thorax & fcutellum ut in G# 

 natatore, fed color fupra obfcure nigro - seneus , pa- 

 rum nitidus,& thoracis margo fubtus seneus nitidior, 

 Elytra antice vix thorace latiora, pofterius parum'at- 

 tenuata apice truncata, angulis rotundatis, fupra re- 

 jrulariter & fatis profunde punclato - ftriata , rufo-fer- 

 ruginea, parum nitida, futura angufte, margine & 

 aptce late nigro fub-seneis; margo inflexus fubtus 

 seneus nitidior. Pectus & abdomen fubtus r.igro-se- 

 nea nitida, fegmento anaii concolore. Pedes rufo* 

 ferruginei. 



Obf t An modo var. immatura feqyentis ? 



4* G. maririus: oblongo - ovatus nigro- 



coeruleus nitidus, fubtus ceneus, elytris 



fortius pun&ato - ftriatis , margine inflexo 



seneo, 



Habitat in aquis paffim, pnsfertim ad littora 



maris. 

 Defcr. Mas duplo minor fcemina; uterqve G« na- 

 tatore pauilo minor, eique fimillimus , in medio ta- 

 men minus dilatatus. Caput, thorax & fcutellum ut 

 in G. natatore. Elytra antice vix dilatata, pofterius 

 parum attenuata, apice truncata, angulis rotunda- 

 tis ; fupra pun&is majoribus , profundius impreills 

 ftriata, nigro- ccerulea nitida, futura margineqve vi- 

 ridi-seneis; margo inflexus fubtus seneus nitidus. 

 Corpus fubtus seneum nitidum, fegmento anali con- 

 colore* Pedes pallide rufefcentes. 



5. G. minutus: oblongo-ovalis, fupra coe- 

 ruleo-virefcens nitidus, fubtus rufo-te- 

 ftaceus, elytris punftato - ftriatis , margine 

 inflexo pedibusque teftaeeis» 



